(Click on the column title to sort by that column)
| # | Catholics | Population | Percent Catholic | Diocese | Year | Source |
|---|---|---|---|---|---|---|
| 1 | 60 | Ahwaz (Chaldean) (Archeparchy) | 2004 | ap2005 | ||
| 2 | 10,000 | Ispahan {Esfáan) (Armenian) (Eparchy) | 2004 | ap2005 | ||
| 3 | 10,000 | Ispahan (Archdiocese) | 2004 | ap2005 | ||
| 4 | 3,000 | Teheran (Chaldean) (Archdiocese) | 2004 | ap2005 | ||
| 5 | 1,500 | Urmya {Rezayeh} (Chaldean) (Archdiocese) | 2004 | ap2005 |
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